It needed to happen at some point. Cities: Skylines had quite a few engine limitations and the core gameplay was too simple, it wasn’t enough to keep piling on new features. A sequel gave them the opportunity to start from scratch and rework fundamental systems (like the roads) without having to ensure old cities still worked.
Not to mentioning releasing the same game twice, 10 years apart…
Looking at you, Cities: Skylines.
It needed to happen at some point. Cities: Skylines had quite a few engine limitations and the core gameplay was too simple, it wasn’t enough to keep piling on new features. A sequel gave them the opportunity to start from scratch and rework fundamental systems (like the roads) without having to ensure old cities still worked.